The free vibrations of a linear conservative system with multiple loading parameters are studied, attention being restricted to pure eigenvalue problems. It is shown that the smallest frequency and external loading parameters of such a system constitute a strictly convex (synclastic) surface which cannot have convexity toward the origin of the “parameter space.” It is further proved that in the case of systems with one degree of freedom only, the surface takes the form of a plane. The practical implications of these results regarding the estimation of the frequencies and/or the stability boundary of the system are discussed. Thus it is observed that, on the basis of the established theorems, lower bounds to the frequencies at any stage of external loading and/or upper bounds to the stability boundary are readily obtainable. A two-degree-of-freedom illustrative example is discussed.
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December 1971
Research Papers
The Loading-Frequency Relationship in Multiple Eigenvalue Problems
K. Huseyin,
K. Huseyin
Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada
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J. Roorda
J. Roorda
Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada
Search for other works by this author on:
K. Huseyin
Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada
J. Roorda
Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada
J. Appl. Mech. Dec 1971, 38(4): 1007-1011 (5 pages)
Published Online: December 1, 1971
Article history
Received:
July 13, 1970
Online:
July 12, 2010
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Citation
Huseyin, K., and Roorda, J. (December 1, 1971). "The Loading-Frequency Relationship in Multiple Eigenvalue Problems." ASME. J. Appl. Mech. December 1971; 38(4): 1007–1011. https://doi.org/10.1115/1.3408902
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